basic_deploy.sh

#!/bin/bash

# Update hosts file
echo "[TASK 1] Update /etc/hosts file"
cat >>/etc/hosts<<EOF
172.10.10.100 master.home.lab master
172.10.10.101 node1.home.lab node1
172.10.10.102 node2.home.lab node2
EOF


echo "[TASK 2] Install docker container engine"
apt-get install apt-transport-https ca-certificates curl software-properties-common -y
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
apt-get update -y
apt-get install docker-ce -y

# add account to the docker group and configure driver to use systemd
usermod -aG docker vagrant
cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
EOF

# Enable docker service
echo "[TASK 3] Enable and start docker service"
mkdir -p /etc/systemd/system/docker.service.d
systemctl daemon-reload
systemctl enable docker >/dev/null 2>&1
systemctl restart docker

# Add sysctl settings
echo "[TASK 4] Add sysctl settings"
cat >>/etc/sysctl.d/kubernetes.conf<<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system >/dev/null 2>&1

# Disable swap
echo "[TASK 5] Disable and turn off SWAP"
sed -i '/swap/d' /etc/fstab
swapoff -a

# Install apt-transport-https pkg
echo "[TASK 6] Installing apt-transport-https pkg"
apt-get update && apt-get install -y apt-transport-https curl
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -

# Add kubernetes sources list 
cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF

ls -ltr /etc/apt/sources.list.d/kubernetes.list

apt-get update -y

# Install Kubernetes
echo "[TASK 7] Install Kubernetes kubeadm, kubelet and kubectl"
apt-get install -y kubelet kubeadm kubectl

# Start and Enable kubelet service
echo "[TASK 8] Enable and start kubelet service"
systemctl enable kubelet >/dev/null 2>&1
systemctl start kubelet >/dev/null 2>&1

# Enable ssh password authentication for copy files between master and nodes
echo "[TASK 9] Enable ssh password authentication"
sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config
sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/g' /etc/ssh/sshd_config
systemctl restart sshd

# Set Root password
echo "[TASK 10] Set root password"
echo -e "kubeadmin\nkubeadmin" | passwd root

# Update vagrant user's bashrc file
echo "export TERM=xterm" >> /etc/bashrc